On Limits of Wireless Communications in a Fading Environment when UsingMultiple Antennas
Wireless Personal Communications: An International Journal
Performance of Space-Time Block Coded MB-OFDM UWB Systems
CNSR '06 Proceedings of the 4th Annual Communication Networks and Services Research Conference
Complex Orthogonal Space-Time Processing in Wireless Communications
Complex Orthogonal Space-Time Processing in Wireless Communications
Multiband-OFDM MIMO coding framework for UWB communication systems
IEEE Transactions on Signal Processing
Space-time-frequency coded OFDM over frequency-selective fading channels
IEEE Transactions on Signal Processing
On space-time-frequency coding over MIMO-OFDM systems
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
IEEE Transactions on Information Theory
Space-time block codes from orthogonal designs
IEEE Transactions on Information Theory
Orthogonal designs with maximal rates
IEEE Transactions on Information Theory
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
Space-time block coding for wireless communications: performance results
IEEE Journal on Selected Areas in Communications
Unitary differential space-time-frequency codes for MB-OFDM UWB
ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
Quasi-orthogonal space-time-frequency codes in MB-OFDM UWB
Computers and Electrical Engineering
Differential space-time-frequency codes for MB-OFDM UWB with dual carrier modulation
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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This paper proposes a general framework of Space-Time-Frequency Codes (STFCs) for Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra-Wide Band (UWB) communications systems. A great similarity between the STFC MB-OFDM UWB systems and conventional wireless Complex Orthogonal Space-Time Block Code (CO STBC) Multiple-Input Multiple-Output (MIMO) systems is discovered. This allows us to quantify the pairwise error probability (PEP) of the proposed system and derive the general decoding method for the implemented STFCs. Based on the theoretical analysis results of PEP, we can further quantify the diversity order and coding gain of MB-OFDM UWB systems, and derive the design criteria for STFCs, namely diversity gain criterion and coding gain criterion. The maximum achievable diversity order is found to be the product of the number of transmit antennas, the number of receive antennas, and the FFT size. We also show that all STFCs constructed based on the conventional CO STBCs can satisfy the diversity gain criterion. Various baseband simulation results are shown for the Alamouti code and a code of order 8. Simulation results indicate the significant improvement achieved in the proposed STFC MB-OFDM UWB systems, compared to the conventional MB-OFDM UWB ones.